From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id A52D7C433F5 for ; Mon, 21 Feb 2022 15:53:47 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 32E4A8D0002; Mon, 21 Feb 2022 10:53:47 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 2DDBC8D0001; Mon, 21 Feb 2022 10:53:47 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1A6538D0002; Mon, 21 Feb 2022 10:53:47 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0077.hostedemail.com [216.40.44.77]) by kanga.kvack.org (Postfix) with ESMTP id 08C508D0001 for ; Mon, 21 Feb 2022 10:53:47 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id A3D83181E8E67 for ; Mon, 21 Feb 2022 15:53:46 +0000 (UTC) X-FDA: 79167232452.14.B87FF2D Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf21.hostedemail.com (Postfix) with ESMTP id 117D31C0010 for ; Mon, 21 Feb 2022 15:53:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=2TqQ5tRnp0eoGVknHFyaLoJzJMPsgZYTcbNRq7FHagU=; b=wLMc/Rg+ITMwdTiRmPZG3N00Gs vz/8IeufoThPVafZriOUNk3MriGnbrudifGg2G9Gnb1GHrZF3G+VHp4PFqkI5cK4830P0CbcecSZU crDwpYFjBlNBNlLdowIWURvNh3dU4bzDPrj8/Ow8LROPCmVxMyxY3j3dwdOPRFnIhyV4Afcaz6Zyk OZa2dpPw+NI2rI8ogND9dKYvekrfYCQ7/Cm5XnRPSQpdVvajtt5lPLfglDijMTr44ye97aO4/APfP OWxJcDVblxQNqtctdiDvRXb+yMUtPhB+/WsanXHpJoCY1tWu3kNw1kMOq8MAf1fx5w0Lt88dOnPeT tOQlmX4w==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nMB0O-001xiY-09; Mon, 21 Feb 2022 15:53:40 +0000 Date: Mon, 21 Feb 2022 15:53:39 +0000 From: Matthew Wilcox To: Hyeonggon Yoo <42.hyeyoo@gmail.com> Cc: linux-mm@kvack.org, Roman Gushchin , Andrew Morton , Vlastimil Babka , linux-kernel@vger.kernel.org, Joonsoo Kim , David Rientjes , Christoph Lameter , Pekka Enberg Subject: Re: [PATCH 3/5] mm/slab: Do not call kmalloc_large() for unsupported size Message-ID: References: <20220221105336.522086-1-42.hyeyoo@gmail.com> <20220221105336.522086-4-42.hyeyoo@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220221105336.522086-4-42.hyeyoo@gmail.com> X-Rspamd-Queue-Id: 117D31C0010 X-Stat-Signature: 33wqk6bt96t8opmgzorjyc6meigf1m18 X-Rspam-User: Authentication-Results: imf21.hostedemail.com; dkim=pass header.d=infradead.org header.s=casper.20170209 header.b="wLMc/Rg+"; spf=none (imf21.hostedemail.com: domain of willy@infradead.org has no SPF policy when checking 90.155.50.34) smtp.mailfrom=willy@infradead.org; dmarc=none X-Rspamd-Server: rspam05 X-HE-Tag: 1645458825-194830 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, Feb 21, 2022 at 10:53:34AM +0000, Hyeonggon Yoo wrote: > SLAB's kfree() does not support freeing an object that is allocated from > kmalloc_large(). Fix this as SLAB do not pass requests larger than > KMALLOC_MAX_CACHE_SIZE directly to page allocator. I was wondering if we wanted to go in the other direction and get rid of kmalloc cache sizes larger than, say, 64kB from the SLAB allocator.